RT Journal Article
T1 Understanding the Geographic Patterns of Closely-Related Species of Paspalum (Poaceae) Using Distribution Modelling and Seed Germination Traits
A1 Glison, Nicolás
A1 Romero-Pacheco, David
A1 Rosso, Virginia
A1 Guerrero, José Carlos
A1 Speranza, Pablo Rafael
K1 Germinación
K1 Paspalum - Hábitat
K1 Paspalum - Semillas
AB The sexual species of the Dilatata complex (Paspalum dasypleurum, P. flavescens, P. plurinerve, P. vacarianum, and P. urvillei) are closely related phylogenetically and show allopatric distributions, except P. urvillei. These species show microhabitat similarities and differences in germination traits. We integrated species distribution models (SDMs) and seed germination assays to determine whether germination divergences explain their biogeographic pattern. We trained SDMs in South America using species’ presence–absence data and environmental variables. Additionally, populations sampled from highly favourable areas in the SDMs of these species were grown together, and their seeds germinated at different temperatures and dormancy-breaking conditions. Differences among species in seed dormancy and germination niche breadth were tested, and linear regressions between seed dormancy and climatic variables were explored. SDMs correctly classified both the observed presences and absences. Spatial factors and anthropogenic activities were the main factors explaining these distributions. Both SDMs and germination analyses confirmed that the niche of P. urvillei was broader than the other species which showed restricted distributions, narrower germination niches, and high correlations between seed dormancy and precipitation regimes. Both approaches provided evidence about the generalist-specialist status of each species. Divergences in seed dormancy between the specialist species could explain these allopatric distributions
PB MDPI
YR 2023
FD 2023-03-16
LK https://hdl.handle.net/10630/26583
UL https://hdl.handle.net/10630/26583
LA eng
NO Glison N, Romero D, Rosso V, Guerrero JC, Speranza PR. Understanding the Geographic Patterns of Closely-Related Species of Paspalum (Poaceae) Using Distribution Modelling and Seed Germination Traits. Plants. 2023; 12(6):1342. https://doi.org/10.3390/plants12061342
NO Funding for open access charge: Universidad de Málaga
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026